You can apply to the course under the available student place scheme at Aarhus BSS in the spring and the fall semester. If you are applying to the available student place scheme at more than one faculty, you must apply to each faculty. http://www.au.dk/evu/uddannelsestyper/tompladsordningen/
Courses in the fall semester: 1 May.
Courses in the spring semester: 1 November.
The application opens approx. 14 days before the application deadline.
You can expect a reply no later than mid-August/early February, depending on when you submitted your application. On some courses, you will not be informed about admission until the semester starts, as the board of studies does not know whether there are any available student places until then.